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What determines the dorso-ventral axis of the vertebrate spinal cord and what are the signals that control this dorsal-ventral polarity?
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- Where is the anterior (ventral) root located in the sequence of structures through which motor impulses pass as they descent from the brain and leve the spinal cord? A. Between anterior (ventral) gray horn and spinal nerve B. Between spinal nerve and posterior (dorsal) root ganglion C. Between anterior (ventral) gray horn and posterior (dorsal) gray horn D. Between white column and posterior (dorsal) gray hornBy what pathway do the axons arising from the cells in the anterior gray horn leave the spinal cord?What is meant by theperipheral nervous system(PNS)?
- What are the two basic ways in which alpha motor neurons are controlled at the level of the spinal cord?How is the position of the spinal cord in the sheep different than in the human brain?What could be the reason why the cerebellum of the frog/toad is relatively smaller compared to those found in birds and mammals?
- Which of the following does NOT contribute to the facilitatory effect of peripheral NE on hippocampal LTP? a.) Visceral sensory nerve b.) Brainstem reticular formation c.) β adrenergic receptors d.) Nuclear receptorsWhat are the functions of the anterolateral and dorsalcolumn/medial-lemniscal systems? Describe where theneurons of these systems cross over and synapse.A motor neuron in the spinal cord typically receives input from neurons that originate in several different regions of the brain. Is this an example of convergence or divergence?